I have a 10 mm diameter rod of 99.5% pure tungsten that I want to drill a 0.1 mm hole in using my Grizzly G0768 lathe. The hole only needs to be between 0.1 mm and 1 mm deep and is for a 3D printer hot nozzle. I don't know if this will break the bit yet, but I will try it when the drill chuck comes in the mail. If the bit breaks, I'll move up to a 0.15 mm hole, and so on...
I can't afford a high precision mill that costs more than $1,000. Assuming my lathe can't drill such a small hole, what other options do I have to accomplish this task on a budget? When I have gone shopping I have seen no indication of the stability / precision of the tools.
I could send the pieces of tungsten off to get drilled, but I expect that might cost a fortune.
If anyone has experience making holes this tiny, I would like to know the approach you used.
I have nice $12, 0.1 mm PCB bits made in Germany from Tungsten Carbide that break if you so much as look at them. I also found some cheaper bits on eBay but they don't look like drill bits so I'm not sure if they'd even cut a hole.